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Description
This textbook explains the various aspects of sustainable agricultures to undergraduate and graduate students. The book first quantifies the components of the crop energy balance, i.e. the partitioning of net radiation, and their effect on the thermal environment of the canopy. The soil water balance and the quantification of its main component (evapotranspiration) are studied to determine the availability of water to rain fed crops and to calculate crop water requirements. Then it sets the limitations of crop production in relation to crop phenology, radiation interception and resource availability (e.g. nutrients). With that in mind the different agricultural techniques (sowing, tillage, irrigation, fertilization, harvest, application of pesticides, etc.) are analyzed with special emphasis in quantifying the inputs (sowing rates, fertilizer amounts, irrigation schedules, tillage plans) required for a given target yield under specific environmental conditions (soil & climate). For all techniques strategies are provided for improving the ratio productivity/resource use while ensuring sustainability. The book comes with online practical focusing on the key aspects of management in a crop rotation (collecting weather data, calculating productivity, sowing rates, irrigation programs, fertilizers rates etc).
Table of Contents
PART A: CROPS AND THE ENVIRONMENT.- Chapter 1. Introduction to agricultural systems.- Chapter 2. The soil. Physical and chemical properties.- Chapter 3. Radiation balance.- Chapter 4. Wind and turbulence.- Chapter 5. Air temperature and humidity.- Chapter 6. Soil temperature.- Chapter 7. The energy balance.- Chapter 8. Water balance: Infiltration, runoff and percolation.- Chapter 9. Evapotranspiration and crop water requirements.- PART B: DETERMINANTS OF CROP PRODUCTIVITY Chapter 10 Crop development and growth.- Chapter 11 Photosynthesis and respiration.- Chapter 12 Density and competition.- Chapter 13. Potential productivity.- Chapter 14 Water-limited productivity.- Chapter 15. Other limitations to crop productivity.- PART C: SOWING, SOIL MANAGEMENT AND SOIL CONSERVATION.- Chapter 16. Planting and sowing.- Chapter 17. Tillage.- Chapter 18. Soil erosion and soil conservation.- PART D: WATER MANAGEMENT AND CONTROL OF SALINITY.- Chapter 19. Irrigation systems.- Chapter 20. Irrigation scheduling.- Chapter 21. Deficit irrigation.- Chapter 22. Control of salinity.- PART E: FERTILIZER MANAGEMENT.- Chapter 23. Fertilizers.- Chapter 24. N fertilization.- Chapter 25. P, K and other nutrients.- Chapter 26. Fertigation.- PART F: ENVIRONMENTAL CONTROL AND OTHER TECHNIQUES.- Chapter 27. Windbreaks, agroforestry.- Chapter 28. Temperature modification.- Chapter 29. Frost control.- Chapter 30. Control of weeds and other biotic factors.- Chapter 31. Application of herbicides and other biotic control agents.- Chapter 32. Harvest and conservation.- Chapter 33. New tools and methods in agronomy: remote sensing, site specific agriculture and simulation modeling applications.- PART G: Cropping systems.- Chapter 34. Cropping and farming systems.- Chapter 35. Farming and the sustainability of food systems.
