Evaluation

Why are projections needed when dealing with geospatial data ?

• Because of the need to preserve certain aspects of mapping  

• The earth is spherical in nature and mapping involves representing the geographical information in two dimensions 

• Need to accurately measure distances, areas or shapes 

• All of the Above 

Topographical sheets come in the following coordinate system ?

• Projected coordinated system 

• Geographical coordinate system 

• All of the above 

The choice of a projection depends on which factors: 

• The extent/ area of the study 

• The type of analysis 

• Possibility of merging with other datasets 

• All of the above 

Which of the following factors directly affect water productivity ?

• Crop Variety 

• Radiation  

• Temperature

• Water pump 

• Soil type 

Which of the following is not affected by the developmental stages of a crop? 

• Reference evapotranspiration 

• Potential evapotranspiration 

• Actual evapotranspiration 

• Transpiration 

An engineer want to find out whether the water supply system installed can sufficiently support crop production in a given scheme. Which performance indicator should he use for assessment? 

• Equity

• Adequacy

• Relative water deficit (RWD) 

• Beneficial Fraction 

What advice would you give to an irrigation manager where the Relative Water Deficit is negative? 

• Irrigate

• Not to irrigate 

• Increase the water application rate 

• Reduce the water application rate 

A DEM image is one example of continuous data. Select one: 

• True

• False

Why is improving land and water productivity important? 

• The availability of water and land resources for agriculture are declining 

• Increasing consumption due to population 

• Increasing consumption due to economic growth 

• Soil degradation 

• All

Water productivity can be expressed as: Select one or more: 

• Output in Kg per meter of water use 

• Output in Ksh per cubic meter of water use 

• Output in Euro per hectare 

• Output in $ per millimeter of water use 

• Number of jobs per cubic meter of water use