Remote sensing of the state of crops and soils

Abstract

Various techniques as well as some general problems of agricultural remote sensing are discussed, with emphasis on the development of techniques to assesssoil productivity (humus content) and the state of crops (weediness,etc.). The techniques considered were tested in conditions of the southern part of the USSR European territory (the Ukraine, Moldavia). Applications of the technique have been exemplified.

Cereal Yield Modeling in Finland Using Optical and Radar Remote Sensing

“…( = 400-700 nm) (4) Thermal infrared channel with ground resolution of 120 m. (5) n.a.-parameter not available (6) S-Equivalent solar radiance (7) -Calibration gain coefficient (8) -Calibration offset coefficient.…”

“…Correspondingly in coarse type soils, the observed yield levels were highest for barley (4,803 kg/ha, 26%), intermediate for spring wheat (4,233 kg/ha, 16%), and lowest for oats (4,146 kg/ha, 32%). In organic type soils containing mixtures of peat and mould in the top soil layer (10-15 cm), the highest yield were recorded for oats (5,978 kg/ha, 28%), intermediate for barley (4,727 kg/ha, 26%) and lowest for spring wheat (3,390 kg/ha, 38%). Especially spring wheat yield levels were significantly reduced by the drought stress in mid-summer (b p , c p ) in the Kuuma ( Figure 4A 1 ), and Drä cksby ( Figure 4B 2 ) experimental sites.…”

“…4) PAR ND model is similar to FAPAR (Fraction of Absorbed Photosynthetically Active Radiation Index, [56][57][58][59]) and fIPAR (fraction of intercepted PAR, [60]). 5) Model V used only in validation part with the dynamic CropWatN crop model ( Figure 1, [29]).…”

“…durum), soybean (Glycine max L.) maize (Zea mays L.) and rice (Oryza sativa L). Previous studies have described attempts to apply both optical and microwave SAR (Synthetic Aperture Radar) satellite data for crop yield modeling and crop inventory monitoring, e.g., Brown et al [1], Henning et al [2], Maas and Dunlap [3] and Kondratyev et al [4] for wheat and maize, Shibayama and Akiyama [5] and Le Toan et al [6] for rice.…”

Remote sensing of terrestrial chlorophyll content

“…The vast majority of the publications were published in Russian or when published in English focused on the ®rst of the three questions (above); that is, What is the type of vegetation there? As Kondratyev and co-workers were assembling their studies for publication as a major book they also produced an English summary of their approach (Kondratyev et al, 1986). Although this research was continued throughout the 1980s there is no evidence that their pioneering research on the remote sensing of chlorophyll content was reaching an international audience.…”