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Precision Agriculture an Overview

Precision Agriculture an Overview. Need for Precision Agriculture (1). In 1970, 190,500,000 ha classified as arable and permanent cropland in the USA Decreased to 187,776,000 ha by 1991.

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Precision Agriculture an Overview

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  1. Precision Agriculturean Overview

  2. Need for Precision Agriculture (1) • In 1970, 190,500,000 ha classified as arable and permanent cropland in the USA • Decreased to 187,776,000 ha by 1991. • Irrigated land in the USA peaked at 20,582,000 hectares in 1980 and has been stable at 18,771,000 hectares since 1989. • Trends suggest that cropland in the USA will not expand beyond the present 190,000,000 ha

  3. Need for Precision Agriculture (2) • Developing world: 760,000,000 hectares classified as cropland and could theoretically increase to 850,000,000 hectares. • World population increases by 86 million people per year (235,000/day, World Resources, 1996). • 33,000 people die each day due to malnutrition/starvation • Cropland needed to feed the human population, if population growth stops and land is preserved, will be roughly 3.3 billion hectares, and likely to become limiting near the year 2050

  4. Need for Precision Agriculture (3) • Probability of bringing 3.3 billion hectares into production from the current 1.4 billion hectares is small (www.igc.org/millennium). • A large portion of the lands considered as 'potentially arable' (e.g., increase from 1.4 to 3.3 billion hectares) include tropical rainforests and other lands that would require massive inputs for any kind of sustained crop production.

  5. Need for Precision Agriculture (4) • Unlikely that the total arable world land will increase beyond its present level • Increased production per unit area will be essential. • Applied precision agricultural production practices are timely and required within the developed and developing agricultural community.

  6. Precision Agriculture? • Human need • Environment • Hypoxia • $750,000,000 (excess N flowing down the Mississippi river/yr) • Developed vs Developing Countries • High vs Low yielding environments

  7. Many research & development practices are not designed to foster site-specific management • Continued success in wheat germplasm and technology dissemination worldwide depends on the free and uninhibited flow of genetic materials and information. Restrictions imposed on such movement due to intellectual property protection could have serious consequences on the ability of developing countries to sustain wheat productivity growth. • …. further gains would have to come from specifically targeting breeding efforts to the unique characteristics of marginal environments

  8. What is Precision Agriculture? • Treating small areas of a field as separate management units for the purpose of optimizing crop production based on in-field variability

  9. Site Specific Management • The application of an input to a specific area based on the evaluation of variability of the need for that input. Richardson, 1996. • Recognition of site-specific differences within fields and tailoring management accordingly, instead of managing an entire field based on some hypothetical average. Emmert, 1995.

  10. Definitions of Precision Agriculture • Using information to better manage farms at the field level or finer resolution. • Optimizing inputs to produce the largest net income. • Combine yield monitors, GPS, Grid Soil Sampling.

  11. What is Precision Farming? • Management by the Field • Management by the foot • Global Positioning Systems • Yield Monitors • Sensor Based Weed Control • Grid Sampling • Variable Rate Fertilizer Application

  12. Oklahoma State University’s Definition of Precision Agriculture • Variable rate application of fertilizers, pesticides or other materials based on the sensed needs of the crop within the following constraints: • Available Technology • Agronomic • Economic

  13. Large Scale (Macro) Variability Within a Field

  14. Intermediate Scale Variability Within a Field IKONI Imagery 4 m Resolution

  15. Small Scale (Micro) Variability Within a Field

  16. Variability in Weed Populations

  17. Variability in Grain Yield

  18. Aerial and Satellite Images GPS Constellations Management Yield Map Computer GIS - Precision Farming Software GPS Referenced Soil Samples Fertilizer Prescription Soils Maps, Elevation Maps, etc. Map Based - Precision Farming

  19. Variable Rate Spray Nozzle Decision Making And Agronomic Strategy Computer and Sensor Assembly Direction of Travel Plant On-the- Go Sensing of Plant Needs and Variable Rate Treatment

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