diseases. Fruit does not have a layer of wax as told 
before so farmers are not ready Because the fruit field 
is easily attacked by pests. The level of pest attack is 
very high when the farmer late to do the packaging of 
fruit. Conversely wrapping fruit when the fruit is still 
too small also makes fruit to fall out. 
Fertilization  done  by farmers is less causing  the 
growth  of  plants  disturbed.  The  high  price  of  non-
subsidized fertilizer is one of the causes of the lack of 
fertilizer  which  resulted  in  low  yields  other  than 
because farmers' crops generally have not entered the 
productive age of 2-10 years. 
The cost of drugs to treat diseases tend to be high 
because  of  the  variety  of  pests  and  diseases 
encountered.  The  lack  of  key  inputs  that  directly 
affect  fertilizers  and  medicines  causes  far-reaching 
crop yields. The problem of the off-farm subsystem, 
the problem faced is the low selling price due to the 
low  quality  of  the  crop.  The  harvest  is  strongly 
influenced  by  the  physical  appearance  of  the  fruit, 
such as the color and smoothness of the fruit skin. The 
color  of  the  fruit  is  too  old  due  to  poor  wrinkling 
mistakes.  Unscheduled  harvests  lead  to 
overproduction but the bad consequences of the fruit 
sale price have been reduced. 
The  marketing  of  this  fruit  resulted  in  many 
farmers  began  to  rely  on  the  sale  of  transplanted 
seedlings. In the field seen some farmers tend to focus 
on grafting graft so that the harvest is low. The farmer 
cuts the fruit on the transplanted portion so that the 
nutrients  are  focused  on  root  growth.  Transplants 
should  only  be  done  when  the  plants  are  grown, 
which is around the age of two years. Young breeds 
cause  the  transplant  plants  to  die  more  easily.  The 
price of citra water apple seeds in the market reaches 
Rp 10,000-Rp15 000. 
3.2.2  Analysis of the Income of Citra Water 
Apple Farming System 
The  analysis  of  farming  is  done  by  calculating  the 
level  of  income  and  R  /  C  ratio  of  cashew  water 
farming system. Respondent analysis of cashew water 
farming  system  done  in  this  research  is  30  people. 
The farming analysis conducted refers to the concept 
of income over the cost of cash costs and total costs. 
Cash costs can be interpreted as costs incurred in 
cash  such  as  the  cost  of  purchasing  production 
facilities,  the  cost  of  labor  outside  the  family  and 
taxes.  The  total  cost  is  the  cash  cost  plus  the 
calculated cost. Calculated costs are expenses that are 
not  in  cash  such  as  fees  for  family  labor  use, 
depreciation  of  equipment  and  the  cost  of 
counterparts for land or lease of land. 
The analysis of farm income is useful to give an 
idea of the advantages or disadvantages of a farm that 
is calculated based on the amount of revenue earned 
less  the  cost  incurred.  Analysis  of  farm  income 
includes  an  analysis  of  revenue  on  cash  costs  and 
income  analysis  over  total  costs.  In  the  cost 
component, the costs incurred by the farmers consist 
of  cash  costs  and  costs  are  taken  into  account. 
Analysis  of  farm  income  is  done  by  comparing 
respondent farmers based on plant age.  
3.2.3  Farming Costs Structure 
Expenditure  or  expense  is  the  entire  sacrifice  of 
economic  resources  in  the  units  of  money  (rupiah) 
required to produce the product within a production 
period.  Production  cost  is  all  expenses  incurred  to 
produce  a  commodity  or  product  either  in  cash  or 
taken into account. The cost of farming is divided into 
cash  costs  and  calculated  costs.  The  calculation  of 
cash  costs  includes  the  cost  of  cutting  the  harvest 
payments, the purchase of fertilizers, medicines, fruit 
wrappers, family labor and other costs such as tax 
costs.  Calculated  costs  or  non  expenses  include 
depreciation expenses and counterpart fees for family 
labor, and land. The balancing cost for  land or land 
rent  is  included  in  the  cost  is  taken  into  account 
because  the  average  farmer  has  his  own  land. 
Depreciation  cost  of  equipment  in  each  used  by 
farmers have the same value because the comparable 
farming  is  a  farm  which  in  the  same  cultivation 
technique so that the equipment used for farming is 
relatively the same. 
3.2.4  Cash Cost 
The cash cost of the citra water apple farming system 
used in Hamlet II Paya Salit Village, Pulau Semikat, 
Langkat District include : 
a.  Seeds 
Seeds  of  plants  used  are  the  result  of  grafting 
seedlings that where the  price of  the seedlings 
transplanted citra water apple are Rp 10.000.00 
b.  Fertilizer 
The use of fertilizer in citra water apple
 farming 
is  manure,  artificial  fertilizer  (NPK  Mutiara, 
Phonska, KCl). The amount of fertilizer used by 
farmers of respondents in 2017 per hectare can 
be seen in the following table.