Agronomic Calendars for the Bushland, Texas Sunflower Datasets

This dataset consists of agronomic calendars for each growing season (year) when sunflower (Helianthus annuus L.) was grown for seed 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). Sunflower was grown on two large, precision weighing lysimeters, each in the center of a 4.44 ha square field. The two fields were the easternmost (NE and SE) of four square fields, which are themselves arranged in a larger square with the fields in four adjacent quadrants of the larger square. Fields and lysimeters within each field are thus designated northeast (NE), southeast (SE), northwest (NW), and southwest (SW). Irrigation was by linear move sprinkler system. Irrigations designated as full 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. Irrigations designated as deficit typically involved full irrigation to establish the crop. A crop calendar for each season lists by date the pertinent agronomic and maintenance operations (e.g., planting, thinning, fertilization, pesticide application, lysimeter maintenance, harvest). For each season there is a crop calendar for the two lysimeters.
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 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 have been used for testing, and calibrating models of ET that use satellite and/or weather data. Resources in this dataset:Resource Title: 2009 Bushland, TX, east sunflower agronomic calendar. File Name: 2009 East Sunflower Calendar.xlsxResource Description: This agronomic calendar lists by date the agronomic operations on the Bushland, TX, large weighing lysimeters and surrounding fields, including tillage, planting, fertilization, pesticide application, furrow diking, irrigations, etc., and also sensor installation, sensor reading that might disturb lysimeter operation (neutron probe readings), maintenance operations such as emptying drainage tanks, adjusting lysimeter scale counterweights, electronic and electrical maintenance, etc. Amounts and kinds of fertilizer and pesticide applications are given with proper chemical names and SI units.Resource Title: 2011 Bushland, TX, east sunflower agronomic calendar. File Name: 2011 East Sunflower Calendar.xlsxResource Description: This agronomic calendar lists by date the agronomic operations on the Bushland, TX, large weighing lysimeters and surrounding fields, including tillage, planting, fertilization, pesticide application, furrow diking, irrigations, etc., and also sensor installation, sensor reading that might disturb lysimeter operation (neutron probe readings), maintenance operations such as emptying drainage tanks, adjusting lysimeter scale counterweights, electronic and electrical maintenance, etc. Amounts and kinds of fertilizer and pesticide applications are given with proper chemical names and SI units.

本数据集包括在 USDA-ARS 保存与生产实验室（CPRL）、土壤与水资源管理研究单元（SWMRU）研究气象站（位于德克萨斯州布什兰，纬度 35.186714°，经度 -102.094189°，海拔 1170 米以上平均海平面）种植向日葵（Helianthus annuus L.）作为种子收获的每个生长季节（年份）的农业日历。向日葵种植于两个大型、高精度称重蒸散量计中，每个蒸散量计位于一个 4.44 公顷的正方形田地的中心。这两个田地是四个正方形田地中最东边的（东北和东南），而这四个正方形田地本身又排列在一个更大的正方形中，该正方形由大正方形的四个相邻象限组成。因此，每个田地内的田地和蒸散量计被指定为东北（NE）、东南（SE）、西北（NW）和西南（SW）。灌溉采用线性移动喷灌系统。被指定为完全灌溉的灌溉措施，其管理旨在每周或更频繁地补充作物使用的土壤水分，具体由土壤剖面水分含量读数确定，该读数使用中子探针在田间进行至 2.4 米深。被指定为缺水的灌溉通常涉及完全灌溉以建立作物。每个季节的作物日历按日期列出了相关的农业和维护操作（例如，播种、疏苗、施肥、农药应用、蒸散量计维护、收获）。对于每个季节，都有两个蒸散量计的作物日历。这些数据集源自旨在确定作物水分利用（ET）、基于参考 ET 的 ET-based 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、数量（完全灌溉或一定程度缺水）、农业实践、品种和天气影响的作物水分生产力的研究。先前的研究出版物主要关注 ET、作物系数和作物水分生产力。作物系数已被 ET 网络所用。这些数据对测试作物 ET、生长和产量的模拟模型具有实用性，并已用于测试和校准使用卫星和/或天气数据的 ET 模型。数据集中的资源包括：
资源标题：2009 年布什兰，德克萨斯州东部向日葵农业日历。文件名：2009 East Sunflower Calendar.xlsx
资源描述：本农业日历按日期列出了在布什兰，德克萨斯州大型称重蒸散量计及其周围田地上的农业操作，包括耕作、播种、施肥、农药应用、沟渠培埂、灌溉等，以及传感器安装、可能干扰蒸散量计操作的传感器读数（中子探针读数）、维护操作，如排空排水罐、调整蒸散量计秤重、电子和电气维护等。施肥和农药的应用量及种类均以适当的化学名称和 SI 单位给出。
资源标题：2011 年布什兰，德克萨斯州东部向日葵农业日历。文件名：2011 East Sunflower Calendar.xlsx
资源描述：本农业日历按日期列出了在布什兰，德克萨斯州大型称重蒸散量计及其周围田地上的农业操作，包括耕作、播种、施肥、农药应用、沟渠培埂、灌溉等，以及传感器安装、可能干扰蒸散量计操作的传感器读数（中子探针读数）、维护操作，如排空排水罐、调整蒸散量计秤重、电子和电气维护等。施肥和农药的应用量及种类均以适当的化学名称和 SI 单位给出。