Growth and Yield Data for the Bushland, Texas Alfalfa Datasets

This dataset consists of growth and yield data for each year when alfalfa was grown at the USDA-ARS Conservation and Production Laboratory (CPRL), Soil and Water Management Research Unit (SWMRU) research weather station, Bushland, Texas (Lat. 35.186714°, Long. -102.094189°, elevation 1170 m above MSL). Alfalfa was grown on two large, precision weighing lysimeters, each in the center of a 4.44 ha square field. The two square fields were themselves arranged with one directly north of and contiguous with the other. The two fields and lysimeters within each field were designated northeast (NE), and southeast (SE). Irrigation was by linear move sprinkler system in autumn 1995 when the alfalfa was planted through 1999. Irrigations were managed to replenish soil water used by the crop on a weekly or more frequent basis as determined by soil profile water content readings made with a neutron probe to 2.4-m depth in the field.
The growth and yield data include height, leaf area index, growth stage, total above-ground biomass, leaf and stem biomass, and final yield. Data are from replicate samples in the field and non-destructive (except for harvest) measurements on the weighing lysimeters. In most cases yield data are available from both manual sampling on replicate plots in each field and from machine harvest.
These datasets originate from research aimed at determining crop water use (ET), crop coefficients for use in ET-based irrigation scheduling based on a reference ET, crop growth, yield, harvest index, and crop water productivity as affected by irrigation method, timing, amount (full or some degree of deficit), agronomic practices, cultivar, and weather. Prior publications have focused on alfalfa ET, comparisons with "tall crop" reference ET, crop coefficients, and crop water productivity. Crop coefficients have been used by ET networks. The data have utility for testing simulation models of crop ET, growth, and yield, and for studies of reference ET methods.
Resources in this dataset:

Resource Title: 1999 Bushland, TX, east alfalfa growth and yield data.
File Name: 1999_alfalfa_plantgrowth&_yield.xlsx.
Resource Description: This dataset consists of growth and yield data the 1999 season when alfalfa was grown at the USDA-ARS Conservation and Production Laboratory (CPRL), Soil and Water Management Research Unit (SWMRU) research weather station, Bushland, Texas (Lat. 35.186714°, Long. -102.094189°, elevation 1170 m above MSL). Alfalfa was grown on two large, precision weighing lysimeters, each in the center of a 4.44 ha square field. The two square fields were themselves arranged with one directly north of and contiguous with the other. Fields and lysimeters within each field were designated northeast (NE), and southeast (SE). Irrigation was by linear move sprinkler system. Irrigations were managed to replenish soil water used by the crop on a weekly or more frequent basis as determined by soil profile water content readings made with a neutron probe to 2.4-m depth in the field. Irrigation management resulted in the crop being well watered and meeting reference “tall crop” conditions during periods before harvests.
The growth and yield data include plant height, leaf area index, growth stage, total above-ground biomass, leaf and stem biomass, and final yield. Data are from replicate samples in the field and non-destructive (except for final harvest) measurements on the weighing lysimeters. In most cases yield data are available from both manual sampling on replicate plots in each field and from machine harvest.
There is a single spreadsheet for the east (NE and SE) lysimeters and fields. The spreadsheets contain tabs for data and corresponding tabs for data dictionaries. Typically, there are separate data tabs and corresponding dictionaries for plant growth during the season, crop growth stage, plant population, manual harvest from replicate plots in each field and from lysimeter surfaces, and machine (combine) harvest. An Introduction tab explains the tab names and contents, lists the authors, explains conventions, and lists some relevant references.

Resource Title: 1998 Bushland, TX, east alfalfa growth and yield data.
File Name: 1998_alfalfa_plantgrowth&_yield.xlsx.
Resource Description: As described above, for 1998 season.

Resource Title: 1997 Bushland, TX, east alfalfa growth and yield data.
File Name: 1997_alfalfa_plantgrowth&_yield.xlsx.
Resource Description: As described above, for 1997 season.

Resource Title: 1996 Bushland, TX, east alfalfa growth and yield data.
File Name: 1996_alfalfa_plantgrowth&_yield.xlsx.
Resource Description: As described above, for 1996 season.

本数据集汇聚了于美国农业部-ARS（农业研究服务局）水土保持与生产实验室（CPRL）、土壤与水资源管理研究单元（SWMRU）气象观测站，位于德克萨斯州布什兰（经度 35.186714°，纬度 -102.094189°，海拔1170米）种植苜蓿期间每年的生长与产量数据。苜蓿种植于两个大型、精密称重式蒸散器中，每个蒸散器均位于一个4.44公顷的正方形田地中央。两个正方形田地彼此相邻，其中一方位于另一方之北。每个田地内的田地与蒸散器分别被标记为东北（NE）和东南（SE）。自1995年秋季苜蓿种植至1999年期间，灌溉通过线性移动喷灌系统进行。灌溉管理旨在根据田间土壤剖面水分含量读数（使用中子探针测量至2.4米深度）确定的每周或更频繁的作物需水量进行补水。
生长与产量数据包括植物高度、叶面积指数、生长阶段、地上总生物量、叶与茎生物量以及最终产量。数据来源于田间重复样本以及称重蒸散器上的非破坏性（除收获外）测量。在大多数情况下，产量数据均来源于每个田地重复地块的现场手动采样以及机器收获。
这些数据集源于旨在确定作物水分利用（ET）、基于参考ET的灌溉调度所用的作物系数、作物生长、产量、收获指数以及受灌溉方法、时间、量（完全或一定程度的水分亏缺）、农艺措施、品种和天气影响的作物水分生产力等的研究。前期出版物主要关注苜蓿ET、与“高秆作物”参考ET的比较、作物系数以及作物水分生产力。作物系数已被ET网络所采用。这些数据对于测试作物ET、生长和产量模拟模型以及参考ET方法的研究具有重要意义。
数据集中的资源包括：
资源标题：1999年德克萨斯州布什兰，东部苜蓿生长与产量数据。
文件名：1999_alfalfa_plantgrowth&_yield.xlsx。
资源描述：该数据集记录了1999年苜蓿在上述地点的生长与产量数据。苜蓿种植于两个大型、精密称重式蒸散器中，每个蒸散器位于一个4.44公顷的正方形田地中央。两个正方形田地彼此相邻，其中一方位于另一方之北。每个田地内的田地与蒸散器分别被标记为东北（NE）和东南（SE）。灌溉通过线性移动喷灌系统进行。灌溉管理旨在根据田间土壤剖面水分含量读数（使用中子探针测量至2.4米深度）确定的每周或更频繁的作物需水量进行补水。灌溉管理确保作物在收获前得到充分灌溉，并满足参考“高秆作物”条件。生长与产量数据包括植物高度、叶面积指数、生长阶段、地上总生物量、叶与茎生物量以及最终产量。数据来源于田间重复样本以及称重蒸散器上的非破坏性（除收获外）测量。在大多数情况下，产量数据均来源于每个田地重复地块的现场手动采样以及机器收获。数据包含一个用于东部（NE和SE）蒸散器和田地的电子表格，其中包含用于数据和相应数据字典的标签页。通常，有单独的数据标签页和对应的数据字典，用于描述整个生长季节的植物生长、作物生长阶段、植物种群、每个田地重复地块及蒸散器表面的手动收获以及机器（联合收割机）收获。简介标签页解释了标签页的名称和内容、作者列表、解释了约定，并列出了一些相关参考文献。
资源标题：1998年德克萨斯州布什兰，东部苜蓿生长与产量数据。
文件名：1998_alfalfa_plantgrowth&_yield.xlsx。
资源描述：如上所述，为1998年的数据。
资源标题：1997年德克萨斯州布什兰，东部苜蓿生长与产量数据。
文件名：1997_alfalfa_plantgrowth&_yield.xlsx。
资源描述：如上所述，为1997年的数据。
资源标题：1996年德克萨斯州布什兰，东部苜蓿生长与产量数据。
文件名：1996_alfalfa_plantgrowth&_yield.xlsx。
资源描述：如上所述，为1996年的数据。